Buggy code:
public class FindDialog extends JFrame implements ActionListener , MouseListener { public static FindDialog SINGLETON = new FindDialog ( ) ; public static int nextResultNum = 1 ; public static int _numFinds = 1 ; protected JButton _search = new JButton ( "Search" ) ; protected JButton _clearTabs = new JButton ( "Clear<seq2seq4repair_space>Tabs" ) ; protected JTabbedPane _tabs = new JTabbedPane ( ) ; protected JPanel _nameLocTab = new JPanel ( ) ; protected JPanel _modifiedTab = new JPanel ( ) ; protected JPanel _tagValsTab = new JPanel ( ) ; protected JPanel _constraintsTab = new JPanel ( ) ; protected JComboBox _elementName = new JComboBox ( ) ; protected JComboBox _diagramName = new JComboBox ( ) ; protected JComboBox _location = new JComboBox ( ) ; protected JComboBox _type = new JComboBox ( ) ; protected JPanel _typeDetails = new JPanel ( ) ; protected JTextField _tag = new JTextField ( ) ; protected JTextField _val = new JTextField ( ) ; protected JTabbedPane _results = new JTabbedPane ( ) ; protected JPanel _help = new JPanel ( ) ; protected Vector _resultTabs = new Vector ( ) ; public FindDialog ( ) { } public void initNameLocTab ( ) { } public void initHelpTab ( ) { } public void setVisible ( boolean b ) { } public void initTagValsTab ( ) { } public void initModifiedTab ( ) { } public void initConstraintsTab ( ) { } public void initTypes ( ) { _type . addItem ( PredicateType . create ( ) ) ; _type . addItem ( PredicateType . create ( MMClass . class , Interface . class ) ) ; _type . addItem ( PredicateType . create ( Actor . class ) ) ; _type . addItem ( PredicateType . create ( Association . class ) ) ; _type . addItem ( PredicateType . create ( Attribute . class ) ) ; _type . addItem ( PredicateType . create ( Classifier . class ) ) ; _type . addItem ( PredicateType . create ( CompositeState . class ) ) ; _type . addItem ( PredicateType . create ( Dependency . class ) ) ; _type . addItem ( PredicateType . create ( Generalization . class ) ) ; _type . addItem ( PredicateType . create ( Instance . class ) ) ; _type . addItem ( PredicateType . create ( Interface . class ) ) ; _type . addItem ( PredicateType . create ( Link . class ) ) ; _type . addItem ( PredicateType . create ( MMClass . class ) ) ; <START_BUG> _type . addItem ( PredicateType . create ( Package . class ) ) ; <END_BUG> _type . addItem ( PredicateType . create ( Operation . class ) ) ; _type . addItem ( PredicateType . create ( Pseudostate . class ) ) ; _type . addItem ( PredicateType . create ( Realization . class ) ) ; _type . addItem ( PredicateType . create ( State . class ) ) ; _type . addItem ( PredicateType . create ( StateVertex . class ) ) ; _type . addItem ( PredicateType . create ( Transition . class ) ) ; _type . addItem ( PredicateType . create ( UseCase . class ) ) ; } public void actionPerformed ( ActionEvent e ) { } public void doSearch ( ) { } public void doClearTabs ( ) { } public void mousePressed ( MouseEvent me ) { } public void mouseReleased ( MouseEvent me ) { } public void mouseEntered ( MouseEvent me ) { } public void mouseExited ( MouseEvent me ) { } public void mouseClicked ( MouseEvent me ) { } public void myDoubleClick ( int tab ) { } public static void main ( String [ ] args ) { } }

Fix:
_type . addItem ( PredicateType . create ( MMPackage . class ) ) ;